About: A simple relation between 1H NMR data and mixing enthalpy for systems with complex formation by hydrogen bonding

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About: A simple relation between 1H NMR data and mixing enthalpy for systems with complex formation by hydrogen bonding Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	enthalpy has been found for systems that form 1:1 complexes by hydrogen bonding. Starting from relatively general assumptions, we havederived two forms of this relation. The first form is represented by proportionality between the solution enthalpy of the proton-donor and the chemical shift change of its active hydrogen atom. The second form is mediated by the relative extent of hydrogen bond formation , a quantity which can be directly evaluated from measurements of either the 1H NMR chemical shift orthe mixing enthalpy. The validity of both relation forms has been convincingly demonstrated for 12 systems formed by a strong proton donor (halothane [1-brom-1-chlor-2,2,2-trifluorethane] or trichloromethane) and an oxygen- or nitrogen-containing proton -acceptor (aliphatic enthalpy has been found for systems that form 1:1 complexes by hydrogen bonding. Starting from relatively general assumptions, we havederived two forms of this relation. The first form is represented by proportionality between the solution enthalpy of the proton-donor and the chemical shift change of its active hydrogen atom. The second form is mediated by the relative extent of hydrogen bond formation , a quantity which can be directly evaluated from measurements of either the 1H NMR chemical shift orthe mixing enthalpy. The validity of both relation forms has been convincingly demonstrated for 12 systems formed by a strong proton donor (halothane [1-brom-1-chlor-2,2,2-trifluorethane] or trichloromethane) and an oxygen- or nitrogen-containing proton -acceptor (aliphatic (en)
Title	A simple relation between 1H NMR data and mixing enthalpy for systems with complex formation by hydrogen bonding A simple relation between 1H NMR data and mixing enthalpy for systems with complex formation by hydrogen bonding (en)
skos:prefLabel	A simple relation between 1H NMR data and mixing enthalpy for systems with complex formation by hydrogen bonding A simple relation between 1H NMR data and mixing enthalpy for systems with complex formation by hydrogen bonding (en)
skos:notation	RIV/60461373:22340/02:00006952!RIV/2004/MSM/223404/N
http://linked.open.../vavai/riv/strany	12307-12310
http://linked.open...avai/riv/aktivita	Z
http://linked.open...avai/riv/aktivity	Z(MSM 223400008)
http://linked.open...iv/cisloPeriodika	47
http://linked.open...vai/riv/dodaniDat	2004
http://linked.open...aciTvurceVysledku	Dohnal, Vladimír Tkadlecová, Marcela
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoká škola chemicko-technologická v Praze / Fakulta chemicko-inženýrská
http://linked.open...dnocenehoVysledku	637212
http://linked.open...ai/riv/idVysledku	RIV/60461373:22340/02:00006952
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	1H NMR; mixing enthalpy; hydrogen bonding (en)
http://linked.open.../riv/klicoveSlovo	1H NMR mixing enthalpy hydrogen bonding
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[425DD162129A]
http://linked.open...i/riv/nazevZdroje	Jornal of Physical Chemistry B
http://linked.open...in/vavai/riv/obor	CB
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...ocetUcastnikuAkce	0 (xsd:int)
http://linked.open...nichUcastnikuAkce	0 (xsd:int)
http://linked.open...UplatneniVysledku	2002
http://linked.open...v/svazekPeriodika	106
http://linked.open...iv/tvurceVysledku	Tkadlecová, Marcela Dohnal, Vladimír
http://linked.open...n/vavai/riv/zamer	http://linked.opendata.cz/resource/domain/vavai/zamer/MSM%20223400008
issn	1520-6106
number of pages	4 (xsd:int)
http://localhost/t...ganizacniJednotka	22340

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